package com.lagou.web;

import com.lagou.domain.User;

import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.net.http.HttpRequest;

public class CheckFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }


    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest)servletRequest;
        HttpServletResponse resp = (HttpServletResponse)servletResponse;
        HttpSession session = req.getSession();

        User user = (User) session.getAttribute("user");
        if(user != null){
            filterChain.doFilter(servletRequest, servletResponse);
        }else{
           resp.sendRedirect("index.html");
        }
    }

    @Override
    public void destroy() {

    }
}
